John of Gaunt - Duke of Lancaster. John of Ghent was his real title & based upon his birth in Ghent [Low Countries]. He was a key figure during the power plays of England in the late 1300's. Check Wikipedia for an interesting and detailed history. His brother was known as the Black Prince and the momentous history involves Richard II and the fight with Henry Tudor. OB: "IOHN OF GAUNT DUKE OF LANCASTER". RX: "LANCASTER HALFPENNY" with date 1792 below. Edge inscription "PAYABLE IN LANCASTER LONTON OR BRISTOL". RR